Whenever a public road or highway within a park or public ground, title to which park or public grounds is vested in the State of Pennsylvania, is laid out, located, relocated, altered, or vacated, in such manner that a public road or highway, approaching, leading into, or contiguous to such park or public grounds, shall become either useless, inconvenient, or burdensome, such public road or highway, approaching, leading into, or contiguous to such park or public grounds, may be altered, relocated, or vacated, by the township supervisors or other officials charged with the duty of maintaining such roads or highways, in whole or in part, for the purpose of making it convenient and suitable as an approach to the roads and highways within said park or public grounds, upon the consent and agreement of: (a) the commissioners or officials charged with the care and management of said park or public grounds; (b) the township supervisors or other officials charged with the duty of maintaining said roads or highways, approaching, leading into, or contiguous to said park or public grounds; and (c) the property owners owning the majority of the frontage of land abutting upon the relocated portion of the roads or highway, approaching, leading into, or contiguous to said park or public grounds.